Co Kerrythere is a listing for O Dulinge, which would be the transplanted Ó Dúnlaing sept, who also came from Co Laois. This name is usually anglicised as Dowling].

By the time of Griffith's 'Primary Valuation' (1847-64) Delany is the most common spelling, and households were found in counties Laois (727) Kilkenny (259) and Tipperary (214). Delaney registers lower numbers: Laois (18) Offaly (7) etc.

In the Registrar General's Report on births in 1890 Delan(e)y is the most common entrant for Co Laois.

There is also a distinct name of French origin, Delaunay/Delaney/Delany & c. meaning 'of the alder grove', found in many parts of France, e.g. Normandy, Poitou-Charentes, Ile-de-France etc. Some instances of Delaney in Britain probably have a continental Norman origin, although there must be many of Irish immigrant stock.The French name is still extant and widespread in France. The phonetic variants Daunay and Dawnay are mostly found in Britain.